AD 93-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; General Dynamics Model 340, 440, and C-131B through C-131H (military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; General Dynamics Model 340, 440, and C-131B through C-131H (military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131B | Airworthiness Directives; General Dynamics Model 340, 440, and C-131B through C-131H (military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131D | Airworthiness Directives; General Dynamics Model 340, 440, and C-131B through C-131H (military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; General Dynamics Model 340, 440, and C-131B through C-131H (military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131F/R4Y-1 | Airworthiness Directives; General Dynamics Model 340, 440, and C-131B through C-131H (military) Series Airplanes |
Unsafe Condition
Failure of the stabilizer attach fittings, and potential subsequent loss of a horizontal or vertical stabilizer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 12 months or 1,500 flight hours after the effective date, inspect horizontal and vertical stabilizer attach fittings per Service Bulletin 640(340D) S.B. No. 55-6. Perform hardness tests on taper pins and split sleeve bushings to ensure equivalent strength between 160-180 ksi. Replace discrepant parts with FAA-approved new parts. Ensure new parts meet hardness requirements before installation.
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Compliance Time
Within 12 months or 1,500 flight hours after the effective date of this AD, whichever occurs first
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Affected Aircraft
General Dynamics Model 340, 440, and C-131B through C-131H (military) series airplanes, all serial numbers, including those modified for turbo-propeller power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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